21333212211 has 8 divisors (see below), whose sum is σ = 29213047504. Its totient is φ = 13837759200.

The previous prime is 21333212207. The next prime is 21333212213. The reversal of 21333212211 is 11221233312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21333212211 - 2² = 21333212207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333212213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96095440 + ... + 96095661.

It is an arithmetic number, because the mean of its divisors is an integer number (3651630938).

Almost surely, 2^21333212211 is an apocalyptic number.

21333212211 is a deficient number, since it is larger than the sum of its proper divisors (7879835293).

21333212211 is a wasteful number, since it uses less digits than its factorization.

21333212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192191141.

The product of its digits is 432, while the sum is 21.

Adding to 21333212211 its reverse (11221233312), we get a palindrome (32554445523).

The spelling of 21333212211 in words is "twenty-one billion, three hundred thirty-three million, two hundred twelve thousand, two hundred eleven".